Flexible container for services that separates implementation and usage from configuration.
flexi-container create services using provied plugin while the default plugin, ObjectContaier, create the service in memory.
flexi-container-socket - socket.io plugin
npm install --save flexi-container
Firts thing we need to create a Contract for our service that the service will implement and the consumer will use:
// math-contract.js
const Contract = require('flexi-container').Contract;
module.exports = new Contract({
add: Contract.Function,
sub: Contract.Function
});Contract's members can be either Contract.Function or Contract.Event.
When members is a Contract.Event, the method will be exposed to the concrete class.
our service just implement a class with the same members
// math.js
class Math {
add(a,b) {
return a + b;
}
sub(a,b) {
return a -b;
}
}to register the service in the container we'll call registerService(contract, implementation, [plugin]) and to use the service a call getService(contract, [plugin])
const flexiContainer = require('flexi-container');
const mathContract = require('./math-contract');
const Math = require('./math');
flexiContainer.registerService(mathContract, new Math());
const math = flexiContainer.getService(mathContract);
console.log(math.add(1,2));
console.log(math.sub(10,5));